CA2028152A1 - Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables - Google Patents

Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables

Info

Publication number
CA2028152A1
CA2028152A1 CA2028152A CA2028152A CA2028152A1 CA 2028152 A1 CA2028152 A1 CA 2028152A1 CA 2028152 A CA2028152 A CA 2028152A CA 2028152 A CA2028152 A CA 2028152A CA 2028152 A1 CA2028152 A1 CA 2028152A1
Authority
CA
Canada
Prior art keywords
objects
fiber optic
distance
permanent magnets
magnetic field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2028152A
Other languages
French (fr)
Other versions
CA2028152C (en
Inventor
John B. Rippingale
Charles R. Upton
Erick O. Schonstedt
Bradley L. Osman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schonstedt Instrument Co LLC
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2028152A1 publication Critical patent/CA2028152A1/en
Application granted granted Critical
Publication of CA2028152C publication Critical patent/CA2028152C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/56—Processes for repairing optical cables
    • G02B6/562—Processes for repairing optical cables locatable, e.g. using magnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Optics & Photonics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

In order to locate, trace, and identify hidden elongated objects, such as buried fiber optic cables, the objects are provided with elongated permanent magnet identifier devices having magnetic fields that may be detected at a distance from the objects. In one embodiment the identifier device comprises an elongated strip magnetized in the direction of its width and formed into a long-pitch helix, producing a characteristic "magnetic field signature" that enhances detection and identification of the object, as by a portable gradiometer that is moved over the surface of the earth along a line generally parallel to the length of the object. This embodiment may provide a magnetic field that diminishes as the square of the distance from the identifier device (rather than the usual cube of the distance), thereby enabling detection at substantial distances. In a second embodiment distinctive magnetic field signatures are produced by arrays of spaced permanent magnets, the fields of which add and subtract to provide resultant magnetic fields with peaks and valleys along a line generally parallel to the length of the object.
CA002028152A 1989-03-15 1990-02-07 Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables Expired - Fee Related CA2028152C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US32386089A 1989-03-15 1989-03-15
US323,860 1989-03-15
US428,757 1989-10-30
US07/428,757 US5006806A (en) 1989-03-15 1989-10-30 Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as burried fiber optic cables

Publications (2)

Publication Number Publication Date
CA2028152A1 true CA2028152A1 (en) 1990-09-16
CA2028152C CA2028152C (en) 1996-01-30

Family

ID=26984176

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002028152A Expired - Fee Related CA2028152C (en) 1989-03-15 1990-02-07 Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables

Country Status (16)

Country Link
US (1) US5006806A (en)
EP (1) EP0419637B1 (en)
JP (1) JP2690192B2 (en)
KR (1) KR930007321B1 (en)
AT (1) ATE114825T1 (en)
AU (1) AU624238B2 (en)
BR (1) BR9005773A (en)
CA (1) CA2028152C (en)
DD (1) DD300464A5 (en)
DE (1) DE69014521T2 (en)
ES (1) ES2024748A6 (en)
HU (1) HU210084B (en)
MX (1) MX172046B (en)
NZ (1) NZ232486A (en)
RU (1) RU2073889C1 (en)
WO (1) WO1990010879A1 (en)

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CN109630770A (en) * 2018-12-17 2019-04-16 王利群 A kind of winding structure pipe and its production technology with location structure
CN109630770B (en) * 2018-12-17 2024-02-20 王利群 Winding structure wall pipe with positioning structure and production process thereof

Also Published As

Publication number Publication date
DE69014521D1 (en) 1995-01-12
HUT57911A (en) 1991-12-30
US5006806A (en) 1991-04-09
JP2690192B2 (en) 1997-12-10
DD300464A5 (en) 1992-06-11
AU624238B2 (en) 1992-06-04
EP0419637B1 (en) 1994-11-30
ES2024748A6 (en) 1992-03-01
KR920700407A (en) 1992-02-19
CA2028152C (en) 1996-01-30
HU903558D0 (en) 1991-11-28
EP0419637A1 (en) 1991-04-03
EP0419637A4 (en) 1992-12-02
DE69014521T2 (en) 1995-06-22
MX172046B (en) 1993-11-30
AU5434490A (en) 1990-10-09
ATE114825T1 (en) 1994-12-15
NZ232486A (en) 1993-04-28
BR9005773A (en) 1991-08-06
JPH03504646A (en) 1991-10-09
KR930007321B1 (en) 1993-08-05
HU210084B (en) 1995-02-28
RU2073889C1 (en) 1997-02-20
WO1990010879A1 (en) 1990-09-20

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